Plastic composition



Patented Oct. 13,. 1925.

UNITED STATES PATENTQOFFICE.

MAX sxonmx, or MINNEAPOLIS, MINNESOTA, ASSIGNOR 'ro ANNIE SKOLNIK. or

MINNEAPOLIS, MINNESOTA.

rLAs'rrc comrosrrron.

1T0 Drawing.

T all whom it may concern Be it known that I, MAX SKOLXIK, a citizen ot' the United States. residing at Minneapolis in th county of Henncpin and State 5 of Minnesota. have invented certain new and useful Improvements in Plastic ompositions. of which the foliowing is a speci-' tication.

My invention relates to plastic compositions. An object of my invention is to produce a composition suitable for use as plaster board. cores for veneers and for other run-poses where it is desirable to use a plastic composition which will harden into a tough and durable product having great strength. and into which nails may be driven and which, at the same time. is of light weight, and may comparatively thin sheets. Another object is to produce a composition of this character which is composed of a large portion of scrap material and which is. therefore, economical to manufacture- Tlie full objects and advantages of my invention will appear in connection with the detailed description thereof. and the novel features embodied in my inventive idea will be particularly pointed out in the claim.

In preparing my composition. I preferably make up a batch by using the following amounts of the various ingredients which are preferably mixed in the following man ner: I take twenty-five pounds of corn stalks or similar stalks having a soft center and reduce the same to a pulp preferably using for this purpose about two pounds of potassium carbonate. them entirely reduced. this material is dried to take out all the moisture; five pounds of paste, such as flour paste. is

be readily pressed into Application filed December 24, 1921 Serial No. 524,764.

then mixed with this materiai "to lorm what will be designated the first mixture. To produce what will he termed 1 second mixture. I reduce twenty-five p1;- paper preferably using for t. is purpose about two pounds of potassium carbonate. To produce What will be designated the third n'lixture, I mix, twenty-five pounds of. sawdust with five pounds ofglue. {These tlireemixtures are then thoroughly mixed together and fifteen pounds of wood' fiber plaster added. 'The resulting product Which is in a plastic condition is then pressed into the desired shape as by rolling it. iutosheetlike form between two sheets otpaper. The

term wood-fibre plaster refers to a wellltuowu commercial product. conmosed of wood-fibre and plaster. The term cornstalks when used in the claim' is to be considered as including other stalks'ot a similar natnre. It is. of course. obvious that-batches of difierent sizes may be mixed using substantiallv the same proportions and that the proportions may be somewhat varied. although I have found by experiment that the proportions abovementioned and thepai ticular order of mixing stated give the best results.

I claim:

A composition for composition comprising the following inads of waste use in making a plastic 'lll gredients in substantially the proportions specified: corn and similar stalks. 25 pounds reduced to a pulp with 2 pounds of alkali. and an adhesive 5 pc nds.

In testimony whereof I hereunto aflix my signature.

MAX SKOLJJK. 

